Yellowing of leaves of wheat after the first irrigation in heavy soils is a common problem faced by farmers. This issue is caused due to a lack of proper nutrients reaching the plant roots.
Heavy soils are known to retain water for a longer period, leading to decreased aeration and eventually, nutrient deficiency. As the roots are unable to absorb nutrients due to waterlogging, the leaves start to turn yellow. This issue is aggravated when farmers water their crop excessively, without allowing the soil to dry.
To rectify this problem, farmers must first determine the cause of the yellowing of leaves. They should conduct a soil test to determine the nutrient and pH level of the soil. In heavy soils with a pH higher than 7, the availability of nutrients to plants decreases due to the formation of insoluble compounds. Hence, farmers should adjust the soil pH to around 6.5 to 7 by applying lime or sulfur.
Farmers should also use fertilizers containing nitrogen, potassium, and phosphorus in the right amount. Nitrogen is essential for the vegetative growth of the plant, while potassium enhances the plant’s ability to withstand stress. Phosphorus helps in root growth and enhances the uptake of other nutrients by the plant.
A proper irrigation schedule should also be followed, ensuring that the soil is not waterlogged. Farmers should irrigate their crop when the soil has dried up to a certain extent. This helps in increasing aeration, enhancing nutrient uptake, and preventing waterlogging.
In conclusion, yellowing of leaves of wheat after the first irrigation in heavy soils is a common problem that can be easily resolved by following the above-mentioned steps. By ensuring a proper irrigation schedule, conducting soil tests, adjusting the soil pH, and providing the right nutrients to the crop, farmers can overcome this problem and ensure a healthy and bountiful harvest.