Crop Production and Management: Comprehensive Study Notes

Introduction to Crop Production and Food Requirements

Paheli and Boojho visited their uncle’s house during their summer vacation. Their uncle is a farmer, and they observed various agricultural tools in his field, including the khurpi, sickle, shovel, and plough. All living organisms require food; while plants can synthesize their own food, animals and humans cannot and must obtain it from plants or other animals.

Food is essential because the energy derived from it is utilized by organisms to carry out vital body functions such as digestion, respiration, and excretion. To provide food for a large population like that of India, regular production, proper management, and efficient distribution are necessary. Food must be produced on a large scale.

Agricultural Practices and the History of Cultivation

Until $10,000\,\text{B.C.E.}$, people were nomadic, traveling in groups in search of food and shelter. They consumed raw fruits and vegetables and hunted animals for food. Eventually, they learned to cultivate land and produce crops such as rice, wheat, and other food items, which marked the birth of agriculture.

A crop is defined as plants of the same kind cultivated at one place on a large scale. For example, a crop of wheat signifies that every plant grown in that specific field is a wheat plant. Crops are broadly classified into cereals, vegetables, and fruits, and they are further categorized based on the season in which they are grown.

Classification of Crops by Season

India is a vast country with varying climatic conditions, including temperature, humidity, and rainfall across different regions. Despite this diversity, two broad cropping patterns are recognized:

1. Kharif Crops: These are crops sown during the rainy season, which in India generally lasts from June to September. Examples include paddy, maize, soyabean, groundnut, and cotton.
2. Rabi Crops: These are crops grown during the winter season, which lasts from October to March. Examples include wheat, gram, pea, mustard, and linseed.

Additionally, pulses and vegetables are often grown during the summer at many places. Notably, paddy cannot be grown in the winter because it requires a significant amount of water and is thus restricted to the rainy season.

The Seven Basic Practices of Crop Production

Cultivation involves a series of activities carried out by farmers over time, similar to those performed by gardeners. These are referred to as agricultural practices and include:

1. Preparation of soil
2. Sowing
3. Adding manure and fertilisers
4. Irrigation
5. Protecting from weeds
6. Harvesting
7. Storage

Soil Preparation: Tilling, Ploughing, and Levelling

Soil preparation is the foundational step in agriculture. The primary goal is to turn and loosen the soil, which allows roots to penetrate deep and breathe easily, even at depth. Loosening the soil also promotes the growth of earthworms and microbes, known as the "friends of the farmer," who further turn the soil and add humus to it.

Turning and loosening are critical because only a few centimeters of the top layer of soil support plant growth. This process brings nutrient-rich soil from deeper layers to the top so plants can access them. The formal name for this process is tilling or ploughing. If the soil is extremely dry, it may be watered before ploughing. The ploughed field may contain large clumps called crumbs, which must be broken. Levelling the field is essential for both sowing and irrigation and is performed using a leveller. Manure is sometimes added before tilling to ensure proper mixing with the soil.

Agricultural Implements: The Plough, Hoe, and Cultivator

Several tools are used to break soil clumps and prepare the land:

Plough: Used since ancient times for tilling, adding fertilizers, removing weeds, and turning soil. It is typically made of wood and drawn by animals like bulls, horses, or camels. It consists of a strong triangular iron strip called a ploughshare and a main long log of wood called a ploughshaft. A handle sits at one end of the shaft, while the other end is attached to a beam placed on the animals' necks.

Hoe: A simple tool used to remove weeds and loosen soil. It features a long rod of wood or iron with a strong, broad, bent iron plate at one end that functions like a blade. It is pulled by animals.

Cultivator: Modern ploughing is done using a tractor-driven cultivator, which significantly saves both labour and time.

Sowing Practices and Seed Quality Selection

Sowing is a critical stage where farmers select high-quality, clean, healthy, and high-yielding seeds. A simple method to separate healthy seeds from damaged ones is the water test: damaged seeds are hollow and float on water, while healthy seeds sink.

Traditional Tool: Traditionally, seeds were sown using a funnel-shaped tool. Seeds were filled into the funnel and passed through two or three pipes with sharp ends that pierced the soil to place the seeds.

Seed Drill: Nowadays, a seed drill is used with tractors. It sows seeds uniformly at equal distances and depths, ensuring they are covered by soil after sowing to prevent birds from eating them. This method saves time and labour.

Appropriate spacing between seeds is necessary to avoid overcrowding, which helps plants receive sufficient light, nutrients, and water. At times, plants are manually removed to prevent overcrowding. Some plants, like paddy, are first grown in a nursery and then transplanted into the field as seedlings.

Adding Manure and Fertilisers: Soil Replenishment

To ensure healthy growth, nutrients must be added to the soil as manure and fertilisers. Continuous cultivation depletes soil nutrients, so farmers must practice