Groundnut (Arachis hypogaea L.) is an annual leguminous crop and is a standout amongst the most vital food and oilseed crop cultivated and consumed in most parts of the world.
Numerous studies have shown that the positive influence of potassium, phosphorus and nitrogen on growth of groundnut.
The weeds that attack our crops are stubborn/undesired plants found in places they are not wanted and therefore causes plants population to fall below economic yield.
Inappropriate management of soil resources compromises soil fertility and in turn leads to declining nutrient deficiency especially in calcium and phosphorus which have been identified as a limiting factor for groundnut production..
Most farmers fail to realise that when they practice improved variety and integration nutrient management, they tend to get and additional return of yield per hectare. Also most farmers assume that removing weeds at any time during the growing season is good enough for obtaining the full benefit of weeding in terms of increased yield. But that is a wrong assumption because every crop has its The critical period of which crop weed competition is the prime factor, that decides the expansion and yield of groundnut. The productivity of groundnut was reported to be reduced significantly once weed competition happens throughout the first stages of crop growth. The critical period of weed competition in groundnut ranged from four to nine weeks . Weeds cause much damage to the groundnut crop during the first 45 days of its growth. The most critical period of weed competition is from 3 to 6 weeks after sowing.
this is a very important agronomic practice for every farmer to embark own because of the climatic conditions of the area your farm is.
The characteristics of Nigeria variety of groundnut such as SAMNUT-21, 22, 24 are shown below;
SAMNUT-21: It is dual purpose (grain and haulm), with good oil content which maybe up to 51%, It is a medium-maturing (115 - 120 days) variety that ranges between 2.5 tons and 4 - 5 tons per hectare. The seed colour is variegated with tan and white colour.
SAMNUT-22: The only distinguishing feature is that the oil content (45 %) is not as high as SAMNUT-21. It is a medium-maturing (115 - 120 days) variety, dual purpose (kernel and haulm), high haulm yield (4 - 5 t ha-1), high pod yield (2 - 2.5 t ha-1).
SAMNUT-24: Is an early-maturing (80 - 90 days) variety with high grain and moderate fodder yield, its pod yield average (2 - 2.5 t ha-1) while the haulm yield is about (2.5 - 3 t ha-1). It is also characterized by high oil content (53 %). Most importantly, it is resistant to rosette disease.
To be continued.......