نتایج جستجو برای: continuous cropping

تعداد نتایج: 270193  

Journal: :Journal of nematology 1995
D B Weaver R Rodríguez-Kábana E L Carden

The effects of cropping systems (fallow, rotation with sorghum-sudangrass hybrid [Sorghum bicolor x S. sudanense], and continuous soybean [Glycine max]), nematicide (aldicarb) treatment, and soybean cultivar on yield and nematode population densities were studied in a field infested with a mixture of Meloidogyne spp. and Heterodera glycines. Soybean following sorghum-sudangrass yielded 111 kg/h...

2010
C. Morel

Monitoring soil phosphorus (P) changes under continuous cropping over decades is an important agronomic and environmental issue. The aim was to determine soil P dynamics in the plough layer as a function of cumulative P budgets (Bcum) across extended cropping periods (7, 12, and 17 yr) for four rates of mineral P fertilization. This field experiment was established in 1975 on a slightly alkalin...

2011
Gary E. Varvel Wallace Wilhelm

Emphasis and interest in carbon (C) and nitrogen (N) storage (sequestration) in soils has greatly increased in the last few years, especially C with its’ potential to help alleviate or offset some of the negative effects of the increase in greenhouse gases in the atmosphere. Several questions still exist with regard to what management practices optimize C storage in the soil profile. A long-ter...

2017
Navjot S. Brar Anil Kumar Balwinder Kumar

The predominance of rice-wheat cropping system in Punjab has resulted in number of ecological problems in the state such as depletion of underground water table, deterioration of soil health by adversely affecting the physical, chemical and biological properties of the soil (Kumar et al., 2016). However, for over a decade, ricewheat cropping system yields in high productivity zones have either ...

Journal: :JCS 2017
Tb. Ai Munandar Sumiati

Corresponding Author: Tb Ai Munandar Department of Informatics Engineering, Faculty of Information Technology, Universitas Serang Raya, Banten, Indonesia Email: [email protected], [email protected] Abstract: Nowadays, agricultural field is experiencing problems related to climate change that result in the changing patterns in cropping season, especially for paddy and coarse grains, pulses...

Journal: :Agronomy 2022

Continuous cropping obstacles limit soybean production. Biochar is beneficial for growth, but it unclear whether biochar performs a sustainable role in continuous cropping. To further explore the effects of on soil properties and ceramic Wagner pot-simulated field experiment was conducted with at different doses (12, 24, 48 t·ha−1) over period 3 years, no fertilizer, (CK) fertilizer (F)treatmen...

2010
A. SANCHEZ JOSE R.

A low-input cropping system has been developed at Yurimiaguas, Peru, to serve as a transition technology between shifting and continuous cultivation for acid soiln of the humid tropics. Principal features are slash-andburn clearing, rotation of acid-tolerant upland rice and cowpea cultivars, maximum residue return, no tillage, and no lime or fertilizer apoiications. When yields decline as a res...

2015
Upendra M Sainju Brett L Allen Thecan Caesar-TonThat Andrew W Lenssen

Information on the effect of long-term management on soil nutrients and chemical properties is scanty. We examined the 30-year effect of tillage frequency and cropping sequence combination on dryland soil Olsen-P, K, Ca, Mg, Na, SO4-S, and Zn concentrations, pH, electrical conductivity (EC), and cation exchange capacity (CEC) at the 0-120 cm depth and annualized crop yield in the northern Great...

Journal: :Computers and Electronics in Agriculture 2016
Bingwen Qiu Zhuangzhuang Wang Zhenghong Tang Chongcheng Chen Zhanling Fan Weijiao Li

Timely and accurate monitoring of cropping intensity (CI) is essential to help us understand changes in food production. This paper aims to develop an automatic Cropping Intensity extraction method based on the Isolines of Wavelet Spectra (CIIWS) with consideration of intra-class variability. The CIIWS method involves the following procedures: (1) characterizing vegetation dynamics from time–fr...

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