Turnip green, cucumber, snapbean, and southern pea response to pesticides in intensive-cropping sequences

1979 ◽  
Vol 27 (4) ◽  
pp. 900-905 ◽  
Author(s):  
Robert E. Wilkinson ◽  
Norman C. Glaze ◽  
Clyde C. Dowler ◽  
Clyde T. Young
Keyword(s):  
Intensive Cropping ◽  
Turnip Green

Carbon stocks in Tasmanian soils

Soil Research ◽  
2012 ◽  
Vol 50 (2) ◽  
pp. 83 ◽  
Author(s):  
W. E. Cotching
Keyword(s):  
Management Practices ◽  
Agricultural Soils ◽  
C Sequestration ◽  
Mean Annual Temperature ◽  
Soil C ◽  
C Stocks ◽  
Initial Soil ◽  
If Current ◽  
Intensive Cropping ◽  
The Difference

Soil carbon (C) stocks were calculated for Tasmanian soil orders to 0.3 and 1.0 m depth from existing datasets. Tasmanian soils have C stocks of 49–117 Mg C/ha in the upper 0.3 m, with Ferrosols having the largest soil C stocks. Mean soil C stocks in agricultural soils were significantly lower under intensive cropping than under irrigated pasture. The range in soil C within soil orders indicates that it is critical to determine initial soil C stocks at individual sites and farms for C accounting and trading purposes, because the initial soil C content will determine if current or changed management practices are likely to result in soil C sequestration or emission. The distribution of C within the profile was significantly different between agricultural and forested land, with agricultural soils having two-thirds of their soil C in the upper 0.3 m, compared with half for forested soils. The difference in this proportion between agricultural and forested land was largest in Dermosols (0.72 v. 0.47). The total amount of soil C in a soil to 1.0 m depth may not change with a change in land use, but the distribution can and any change in soil C deeper in the profile might affect how soil C can be managed for sequestration. Tasmanian soil C stocks are significantly greater than those in mainland states of Australia, reflecting the lower mean annual temperature and higher precipitation in Tasmania, which result in less oxidation of soil organic matter.

scholarly journals Land Use and Family Formation in the Settlement of the US Great Plains

2012 ◽  
Vol 36 (3) ◽  
pp. 279-310 ◽  
Author(s):  
Myron P. Gutmann ◽  
Sara M. Pullum-Piñón ◽  
Kristine Witkowski ◽  
Glenn D. Deane ◽  
Emily Merchant
Keyword(s):  
Land Use ◽  
Great Plains ◽  
Agricultural Land ◽  
Family Formation ◽  
Descriptive Analysis ◽  
The United States ◽  
Level Data ◽  
The Us ◽  
Intensive Cropping ◽  
Western Great Plains

In agricultural settings, environment shapes patterns of settlement and land use. Using the Great Plains of the United States during the period of its initial Euro-American settlement (1880–1940) as an analytic lens, this article explores whether the same environmental factors that determine settlement timing and land use—those that indicate suitability for crop-based agriculture—also shape initial family formation, resulting in fewer and smaller families in areas that are more conducive to livestock raising than to cropping. The connection between family size and agricultural land availability is now well known, but the role of the environment has not previously been explicitly tested. Descriptive analysis offers initial support for a distinctive pattern of family formation in the western Great Plains, where precipitation is too low to support intensive cropping. However, multivariate analysis using county-level data at 10-year intervals offers only partial support to the hypothesis that environmental characteristics produce these differences. Rather, this analysis has found that the region was also subject to the same long-term social and demographic changes sweeping the rest of the country during this period.

scholarly journals Effect of Long Term Fertilization on Soil K Dynamics and Uptake by Hybrid Maize in an Irrigated Inceptisol under Intensive Cropping

2017 ◽  
Vol 6 (10) ◽  
pp. 1049-1061
Author(s):  
Pragyan Paramita Rout ◽  
N. Chandrasekaran ◽  
K. Arulmozhiselvan ◽  
Dhaneshwar Padhan
Keyword(s):  
Intensive Cropping ◽  
Hybrid Maize

scholarly journals The Root Rot-Fusarium Wilt Complex of Peas

1963 ◽  
Vol 16 (1) ◽  
pp. 55 ◽  
Author(s):  
A Kerr
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Root Rot ◽  
Fungal Pathogens ◽  
South Australia ◽  
Pythium Ultimum ◽  
Wilt Symptom ◽  
Intensive Cropping ◽  
Race 2

At least four fungal pathogens are involved in the root rot-Fusarium wilt complex of peas which is a serious problem following intensive cropping of peas in South Australia. The pathogens are Fusarium oxysporum f. pisi race 2 Snyder & Hansen, F. solani f. pisi Snyder & Hansen, Pythium ultimum Trow, and Ascochyta pinodella L. K. Jones. In susceptible pea cultivars there is a marked interaction between F. oxysporum and P. ultimum. P. ultimum alone causes initial stunting from which plants gradually recover; F. OX1Jsporum alone probably CRuses little damage; both fungi together CRuse initial stunting followed by severe wilt symptom about 6 weeks after sowing and death 2 weeks later. The importance ofF. solani and A. pinodella has not been fully determined, but they probably cause only minor damage.

Cleome rutidosperma (fringed spiderflower).

2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez
Keyword(s):  
East Asia ◽  
Environmental Conditions ◽  
South East Asia ◽  
Editorial Committee ◽  
Flora Of China ◽  
Wide Range ◽  
Intensive Cropping ◽  
Stone Walls ◽  
Cleome Rutidosperma ◽  
Abandoned Lands

Abstract C. rutidosperma is a common herb that grows as a weed in disturbed and ruderal habitats, principally in areas with humid and hot environmental conditions. It is often found as a weed of disturbed ground, roadsides, gardens, crops and abandoned lands, and has also been found growing as an epiphyte on trees, stone walls and cliff faces. This species is included in the Global Compendium of Weeds (Randall, 2012) where it is considered to have moderate economic impacts in a wide range of crops, due to its scrambling habit that smothers and stunts young crop plants. C. rutidosperma has been listed as invasive in China, Malaysia, India, Thailand, Vietnam, Australia, and the Domican Republic (Waterhouse and Mitchell, 1998; Kairo et al., 2003; Flora of China Editorial Committee, 2014, USDA-ARS, 2014). This species has had considerable environmental impacts in South East Asia and Australia. C. rutidosperma also has the potential to be moderately problematic in intensive cropping areas, greenhouses and nurseries.

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